Nattokinase

I wonder; does anyone take Nattokinase, and if so, what make/ dose do you take ..... And have you found it's helped/ what has it's effects been?

I have a family history (father) of 'Hughes Syndrome' (sticky blood) and am wondering if I have the genietic suseptibility too as it does run in families and also cause symptoms similar to M.E/ CFS. I recently had 3 day course of low dose heparin and felt so much better it got me thinking that a blood thinner taken regularly could really help me.